
\begingroup
\centering
\begin{tabular}{lccccc}
   \toprule
    & \multicolumn{5}{c}{Ammonia}\\
                           & (1)             & (2)             & (3)             & (4)             & (5)\\  
   \midrule 
   ATT                     & -0.0595$^{***}$ & -0.0793$^{***}$ & -0.0880$^{***}$ & -0.1022$^{***}$ & -0.1657$^{***}$\\   
                           & (0.0098)        & (0.0252)        & (0.0256)        & (0.0258)        & (0.0314)\\   
    \\
   Dependent variable mean & 0.13781         & 0.13459         & 0.13579         & 0.13864         & 0.15174\\  
   Observations            & 121,933         & 13,756          & 12,683          & 11,566          & 8,813\\  
   Adjusted R$^2$          & 0.15209         & 0.37473         & 0.38759         & 0.40176         & 0.45527\\  
   Control Group           & NT              & NYT 2018        & NYT 2016-2018   & NYT 2014-2018   & NYT 2009-2018\\  
   \# HUC12                & 7,487           & 299             & 292             & 286             & 264\\  
   \# Control HUC12        & 7,185           & 12              & 34              & 55              & 124\\  
   \# Control Obs          & 107,676         & 676             & 1,577           & 2,343           & 3,404\\  
   \bottomrule
\end{tabular}
\par\endgroup


